Example of Sequential CircuitSynthesis.

Verilog Supports both types of numbers, but with certain restrictions. Like in C language we don't have int and unint types to say if a number is signed integer or unsigned integer.

Example of Sequential Circuit Synthesis.

Some examples of Verilog data types are: reg,wire, integer ..

In June 2006, VHDL Technical Committee of Accellera (delegated byIEEE to work on next update of the standard) approved so called Draft3.0 of VHDL-2006. While maintaining full compatibility with olderversions, this proposed standard provides numerous extensions that makewriting and managing VHDL code easier. Key changes includeincorporation of child standards (1164, 1076.2, 1076.3) into the main1076 standard, an extended set of operators, more flexible syntax of'case' and 'generate' statements, incorporation of VHPI (interface toC/C++ languages) and a subset of PSL (Property Specification Language).These changes should improve quality of synthesizable VHDL code, maketestbenches more flexible, and allow wider use of VHDL for system-leveldescriptions.

VHDL and Verilog Test Bench Synthesis - SynaptiCAD Inc.

VHDL is a fairly general-purpose language, and it doesn't require asimulator on which to run the code. There are a lot of VHDL compilers,which build executable binaries. It can read and write files on thehost computer, so a VHDL program can be written that generates anotherVHDL program to be incorporated in the design being developed. Becauseof this general-purpose nature, it is possible to use VHDL to write a that verifies the functionality of the design using files on the hostcomputer to define stimuli, interacts with the user, and comparesresults with those expected. This is similar to the capabilities of the. VHDL is a language, and as a result is considered by some to be superior to Verilog. The superiority of one language over the other has been the subject of intense debate among developers,for a long time. Both languages make it relatively easy for aninexperienced developer to produce code that simulates successfully butthat cannot be synthesized into a real device, or is too large to bepracticable. One particular pitfall in both languages is the accidentalproduction of rather than as storage elements.

System Verilog: Associative Arrays – VLSI Pro

As with VHDL simulators, free FPGA synthesis tools are readilyavailable, and are more than adequate for independent study. Feedbackfrom the synthesis tool gives the user a feel for the relativeefficiencies of different coding styles. A schematic/gate viewer showsthe user the synthesized design as a navigable netlist diagram. Many design packages offer alternative design input methods, such asblock-diagram (schematic) and state-diagram capture. These provide auseful starting template for coding certain types of repetitivestructures, or complex state-transition diagrams. Finally, the includedtutorials and examples are valuable aids.

Verilog 1995 version has been in market for a very long time

The simulation-only constructs can be used to build complexwaveforms in very short time. Such waveform can be used, for example,as test vectors for a complex design or as a prototype of somesynthesizable logic that will be implemented in future.

Introduction to Intel Quartus Prime Pro Edition

Note: One thing that is common to if-else and case statement is that, if you don't cover all the cases (don’t have else in if-else or default in case), and you are trying to write a combination statement, the synthesis tool will infer Latch.